This is a handy calendar. Just hover over the time on your toolbar and it opens. It adds one more to your auto-start programs but it is small and you won't notice any time lag on starts. I wish it had a means of flagging recurring days like a Friday every 2 weeks when I have a day off from work. I use this in conjunction with another program to be able to edit the appearance of the Windows time (TClock Lite)
Price: Free review details